Vibration isolation and dual-stage actuation pointing system for space precision payloads

Kong, Yongfang

doi:10.1016/j.actaastro.2017.11.038

Cited by 43 publications

(13 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Note that this additional dynamics was the main restriction to design the DVF of Eq. (16). The third one is the similar value of c, which is 0.78 for the experimental, whereas for the numerical simulation it is 0.80.…”

Section: Vibration Isolation Effect On the Base Structurementioning

confidence: 53%

“…The control force in AVI systems is not only generated as a reaction of the relative movement between base and platform but an actuator is located between them, allowing application of an additional control force by the use of feedback or feedforward control techniques. This makes AVI systems the most suitable for many applications [2,16,18,25]. However, it is necessary to deal with some additional challenges of AVI, such as instability of the control system, real-time signal processing, the inherent isolator dynamics and the influence of the control force on the support structure.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Passive and active vibration isolation under isolator-structure interaction: application to vertical excitations

et al. 2021

View full text Add to dashboard Cite

This work studies the influence of a vibration isolator on the response of a flexible base structure. Two strategies are compared: passive and active vibration isolation (PVI, AVI). Although the multiple advantages of AVI over PVI techniques are well known, their effect in the base structure has not to date been compared. This interaction has an important role in the performance of the general control system, especially when the vibration isolation system is not the only system on the base structure or when there are multiple isolators working simultaneously on it. In addition, the structural serviceability of the base structure can also be affected. The analysis of the vibration isolation problem is made from a wide perspective, including the effect that isolator has on the base structure. Hence assuming the base structure is a non-rigid system. The effect of the isolation system on the base response is studied for an extensive range of base structures, thus showing different possible scenarios. The influence is quantified by comparing the peak magnitude response of the base when both passive and active vibration isolation techniques are used. The theoretical results have been corroborated by undertaking experimental tests on a full-scale laboratory structure.

show abstract

Section: Vibration Isolation Effect On the Base Structurementioning

confidence: 53%

Section: Introductionmentioning

confidence: 99%

Passive and active vibration isolation under isolator-structure interaction: application to vertical excitations

et al. 2021

View full text Add to dashboard Cite

show abstract

“…The VCM works well in the frequency of zero to tens of Hertz, but its high frequency dynamics is not good enough [16]. Moreover, for the micro vibration isolation, the resolution of the VCM is not high enough as well [17], [18].…”

Section: Introductionmentioning

confidence: 99%

Design and Control of a Dual-Stage Actuation Active Vibration Isolation System

Zhao¹,

Shi²,

Tan³

2019

IEEE Access

View full text Add to dashboard Cite

Active vibration isolation system is used in various fields to reduce the vibrations transmitted. In this paper, a novel dual-stage actuator is proposed, which combines a voice coil motor and a piezoelectric actuator. The proposed dual-stage actuator maintains the advantages, in terms of the long stroke, the high precision, and the wide band. The dual-stage actuation active vibration isolation system (DSA-AVIS) with the proposed dual-stage actuator is initially modeled. The characteristic of the DSA-AVIS is subsequently analyzed. H ∞ controller is finally designed to consider the vibration isolation performance and the output range of the actuators. The experimental results indicate that the closed-loop transmissibility of the DSA-AVIS is less than -18 dB from 0 to 100 Hertz.

show abstract

“…At present, the research on positioning and vibration isolation platform is divided into two types, namely, micropositioning and vibration isolation platform and macro-and microcombined platform [13]. e most studied active vibration isolation platform is based on the Stewart configuration [14][15][16], followed by the noncontact vibration isolation platform based on Lorentz force actuators [12,[17][18][19][20]. In addition, there are microvibration active vibration isolation platforms designed according to other different working principles of actuators [21][22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Dynamic Modeling and Active Vibration Isolation of a Noncontact 6‐DOF Lorentz Platform Based on the Exponential Convergence Disturbance Observer

Zhou

Chen

Zhao

et al. 2021

Shock and Vibration

View full text Add to dashboard Cite

In order to study the vibration isolation and positioning performance of the noncontact 6-DOF platform in the space microgravity environment, this paper presented a cosimulation model of a virtual prototype. Based on the model driven by biaxial noncontact Lorentz force actuators (NLFAs), an equivalent dynamic model has been established. In the meanwhile, the 6-DOF sliding mode robust controller with exponential convergence disturbance observer is developed. The mechanical system simulation model was designed using ADAMS, and the corresponding 6-DOF decoupling control system and disturbance observer programs were developed using MATLAB/Simulink. According to the mechatronics simulation results, the system can enable the floating platform to achieve micron-level posture positioning within 0.5 s. In vibration isolation simulation, the disturbance observer can predict the external disturbance input and compensate the control force more accurately so that the floating platform can effectively suppress low-frequency disturbance and step disturbance under the control of the sliding mode controller. And the displacement of the floating platform under the disturbance of 1–100 Hz frequency sweep is less than 1 μm.

show abstract

Vibration isolation and dual-stage actuation pointing system for space precision payloads

Cited by 43 publications

References 29 publications

Passive and active vibration isolation under isolator-structure interaction: application to vertical excitations

Passive and active vibration isolation under isolator-structure interaction: application to vertical excitations

Design and Control of a Dual-Stage Actuation Active Vibration Isolation System

Dynamic Modeling and Active Vibration Isolation of a Noncontact 6‐DOF Lorentz Platform Based on the Exponential Convergence Disturbance Observer

Contact Info

Product

Resources

About